Rotation device for fluid-pressure-operated-hammer tools.



A. H. TAYLOR. ROTATION DBVIGB FOR FLUID PRESSURE OPERATED HAMMER TOOLS.

APPLICATION FILED AUG. 6, 1909.

Patented Mar. 8, 1910.

UNITED STATES] PATENT OFFICE.

ALBERT H. TAYLOR, OF EAS'ION, PENNSYLVANIA, ASSIGNORTO INGERSOLL-RAND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF'NEW JERSEY.

ROTATION DEVICE FOR FilUID-PRESSURE-OPERATED-HAMMER TOOLS.

Specification of Letters Patent. Application filed August 6, 1909. Serial No. 511,552.

Patented Mar. *8, 1910.

certain improvements in the construction,

form and arrangement of the several parts of a rotation device for fluid pressure operated hammer tools whereby the rotation of the tool steel will be produced independent of the hammer piston or its operating mechanism and which will be positive in its motion.

In the accompanying drawings, Figure 1 represents artly in side elevation and partly in longitu inal central section so much of a hammer tool as will give a clear understanding of the construction, location and operation of my improved rotation device, Fig. 2 is a transverse section taken in the plane of the-line A-Aof Fig. 1, Fig. 3 is a transverse section taken in the plane of the line BB of Fig. 1, Fig. 4 is a longitudinal section taken in the plane of the line C-C of by 10. The front Fig.1, with the movableparts at the limit (if their movement in one direction, and Fi 5 is a similar view. with the parts at the limit of their movement in the opposite direction.

The cylinder 1 of the tool 1s provided with a i'ston hammer 2 and an anvll block 3. A va ve casing 4 is provided for the front end of the cylinder 1, which casing is fixedly secured to the cylinder as, for instance, by a A front plate 6 is secured to the outer end of the'casing 4:. e The shank 7 of the tool steel extends through the chuck into engagement with the anvil block This chuck 8 is shown herein as being rotatably mounted within the' front plate 6 and the front end of the cylinder 1. An oscillatingring 9 is mounted in the valve casing 4 around an enlarged portion of the chuck 8.

Any suitable device may be employed for clutching and releasing the chuck and oscillating ring, that shown herein being of the roller clutch type, the rollers being denoted late 6 serves to retain the rollers and osci lating'ring in position.

'Larger and smaller'tran'sversely arranged cylindrical chambers 11 and 12 are provided in the valve casing 4 and the oscillating ring 9 is provided'with an arm 13 which projects through'a slot 14 into the cylindrical chamher 11. Pistons 17 and 18' are located within the cylindrical chamb'er 11 upon opposite sides of the arm 13 of the rotation ring. Caps 19 and 20 screwed into the opposite ends of the cylindrical chamber 11 serve to limit'the I outward movements of the pistons 17 '18. A valve 21 is fitted to'reciprocate in the cyhndrical chamber 12. Caps 22, 23, screwed into the opposite ends of the cylindrical chamber 12 serve'to limit the movements of the valve 21. Ports 24, 25, lead from the opposite ends of the chamber 11 into the opposite ends of the chamber 12 and ports 26, 27, lead from the opposite ends oli-the chamber 12 to external atmosphere.

The valve 21 is-provided, adjacent to its ends, with reduced portions forming circumferential ports 28, 29, which'iire at all times ln open communication with the'source of motive fluid supply independent of the hammerpiston 2 and its operating mechanism, through branch ports 30, 31, leading from a longitudinal passage 32 in the wall of the cylinderl. The valve 21 is provided with a pin 15 which projects through a slot 16 into the cylindrical chamber 11 in position to be engaged by the inner sides of the pistons 17, '18. I In operation, presupposing the parts to be m the position in which they are shown in F igs. 1, 2, 3 and 4, the valve 21 'is in such a position that the motive fluid which enters the port 28 is cut oil from escape while the motive fluid which enters the port 29 passes through-the port 25 to the outer side of the piston 18. This will force the pistdii 18 toward the limit of its inwardmovement, causing it to rock the arm 13 of the'rotation ring and through the arm to move the piston 17 to the limit of its outward movement,

thespace beyondthe piston 17 bein in open communication with the externa atmosphere through the ports 24 and 26. As the clutch is herein represented, this movement of the oscillating ring 9 will not rotate the chuclds S. As the piston 18 approaches the limitof its inward movement, its inner side engagesthe in 15 of the valve 21 and moyes the va ve to the limit of its movement in the opposite direction, viz; that shown in Fig. 5. This mov ent of the valve 21 willshut oil the flow of the mo" tive fluid leading through port 29 and open the motive fluid leading through port 28 to the outer side of the piston 17 through the lating ring it will be clutched to the chuck 8 by the rollers lOand thereby rotate the chuck and thus the tool steel 7. As-the piston 17 nears the limit of its inward movement, it will engage the pin 15 and move the valve 21 back to its original position.

hen the parts are in the position shown in Fig. '5, the space in front of the piston 18 Will be open toexternal atmosphere, through the ports 25 and 27. I

Itwill furthermore be seen that the ports 26 and 27 in the valve chamber 12 are alternately covered by the opposite ends of the valve 21 during its reciprocatory movements.

What I claim is v 1. In a fluid pressure operatedhammer tool, a. tool steel, an oscillating ringfor rotating it, a valve and a pair of pistons for o eratin the oscillatin rin and means tons for positively moving the said valve.

3. In av fluid pressure operated. hammer carried by the valve arrangedin position to be engaged by the pistons tor'positively moving the said valve.

2. In a fluid pressure operated hammer tool, a tool steel, its chuck, an oscillating ring for. rotating the chuck, a valve and a pair of pistons for operating the oscillating ring and means carried by the valve ar-" ranged in position to be engaged by the pistool, a tool steel, an oscillating ring for roanism for operating the oscillating ring and tating it, a valveand a-pair of pistons actuat'ed independently of the hammer piston and its operating mechanism for operating the oscillating ring-and means carried by the valve arranged in position to be engaged by the pistons for positively moving the said valve.

4. In a fluid pressure operated hammer tool, a tool steel, its chuck, an oscillating.

ring for rotating the chuck, a valve and a pair ofpistons actuated independently of the hammer piston and its operating mechmeans carried'b'y the valve arranged in positionto be engaged by the pistons for posttively moving the said valve.

5. In a fluid pressure operated hammer istons tool, a piston chamber, a pair of therein, atool steel, an oscillatlng ring for therein, a'tool steel, an oscillating ring for y rotating it, said ring'having an arm pro- I jecting into the piston chamber between the said pistons, a valve for controllingthe reciprocating movements of the pistons for operating the oscillating ring and a pin carriedxby the valve projecting into the piston chamber in position to'be engaged by the said pistons for positively moving the valve, the pistons being actuated by means independent of the hammer piston and its operating mechanism.

' 7. In a fluid pressure operated hammer tool, a piston chamber, a pair of pistons therein, a tool steel, its chuck, an oscillating ring for rotating the chuck, said ring having an arm' projecting into the piston chamber between said pistons, a'valve for controlling the reciprocating movements of the pistons for. operating the oscillating ring and a pin carried by the valve pro ecting into the-piston chamber in position to be' pistons for positively movengaged by the ing the valve.

8. In a fluid pressure operated hammer tool, a piston chamber, a pair of pistons therein, a tool steel, its chuck, an oscillating ring for rotating the chuck, said ring having an arm projecting into the )iston chamber between'said pistons, a va ve for controlling the reciprocating movements 0- the pistons for operating the oscillating ring and a pin carried by the valve projecting into the piston-chamber in position to be engaged by the pistons for positively moving the valve, said pistons being actuated by means independent of the hammer piston and its operating mechanism.

In testimony, that I claim the ioregoing l as my invention, I have signed my name in presence of two witnesses, this fourth day of August 1909.

Witnesses: WARD RAYMOND, RUssELL H. IVILHELM.

ALBERT H. TAYLOR. 

